Income Tax Calculator

Understanding Federal Income Tax

The U.S. federal income tax is a progressive tax system, meaning that higher income levels are taxed at higher rates. This calculator estimates your federal income tax liability or refund based on your income, deductions, credits, and payments throughout the year.

Your tax obligation depends on several factors including your filing status, total income, allowable deductions, and qualifying tax credits. Understanding these components can help you plan your finances and potentially reduce your tax burden legally.

How Taxable Income is Determined

Your taxable income is calculated through a series of steps:

1. Calculate Total Income: Add all income sources including wages, self-employment, investments, and other income
2. Subtract Above-the-Line Deductions: Deduct IRA contributions, student loan interest, HSA contributions, and other adjustments to arrive at Adjusted Gross Income (AGI)
3. Subtract Standard or Itemized Deduction: Choose the larger of the standard deduction or your itemized deductions
4. Calculate Tax: Apply the appropriate tax brackets to your taxable income
5. Apply Credits: Subtract tax credits from your calculated tax
6. Determine Refund or Amount Owed: Compare your total tax to amounts already withheld or paid

2026 Federal Tax Brackets

The U.S. uses a marginal tax system with seven tax brackets. Each bracket applies only to income within that range, not your entire income.

Standard Deduction Amounts (2026)

Types of Tax Deductions

Above-the-Line Deductions

These deductions reduce your Adjusted Gross Income (AGI) and are available regardless of whether you itemize:

• Traditional IRA contributions (up to $7,000, or $8,000 if 50+)
• Student loan interest (up to $2,500)
• Health Savings Account (HSA) contributions
• Self-employment tax (50% of self-employment tax)
• Educator expenses (up to $300)

Itemized Deductions

If your itemized deductions exceed the standard deduction, you may choose to itemize:

• State and local taxes (SALT) - capped at $10,000
• Mortgage interest on loans up to $750,000
• Charitable contributions
• Medical expenses exceeding 7.5% of AGI

Common Tax Credits

Tax credits directly reduce your tax liability dollar-for-dollar and are more valuable than deductions:

Child Tax Credit

Up to $2,000 per qualifying child under age 17. The credit phases out at higher income levels.

Other Dependent Credit

$500 for each qualifying dependent who isn't eligible for the Child Tax Credit.

Earned Income Tax Credit (EITC)

A refundable credit for low to moderate-income workers, with the amount depending on income and number of children.

Child and Dependent Care Credit

20-35% of qualifying expenses up to $3,000 for one dependent or $6,000 for two or more.

Education Credits

• American Opportunity Credit: Up to $2,500 per student for the first four years of college
• Lifetime Learning Credit: Up to $2,000 per tax return for any level of education

Self-Employment Tax

Self-employed individuals pay both the employer and employee portions of Social Security and Medicare taxes:

• Social Security: 12.4% on income up to $168,600 (2024)
• Medicare: 2.9% on all self-employment income
• Additional Medicare: 0.9% on self-employment income over $200,000 (single) or $250,000 (married filing jointly)

Capital Gains Tax

Capital gains are taxed differently based on how long you held the asset:

Short-Term Capital Gains

Assets held for one year or less are taxed as ordinary income at your regular tax rate.

Long-Term Capital Gains

Assets held for more than one year receive preferential tax rates:

• 0%: Taxable income up to $47,025 (single) or $94,050 (married filing jointly)
• 15%: Taxable income up to $518,900 (single) or $583,750 (married filing jointly)
• 20%: Taxable income above the 15% threshold

Tax Planning Strategies

1. Maximize Retirement Contributions: Contribute to 401(k), IRA, or other tax-advantaged accounts
2. Use HSA Accounts: Triple tax advantage - deductible contributions, tax-free growth, and tax-free withdrawals for medical expenses
3. Tax-Loss Harvesting: Offset capital gains with capital losses
4. Bunch Deductions: Alternate between standard and itemized deductions by timing expenses
5. Qualified Charitable Distributions: If over 70.5, donate directly from IRA to charity

Important Deadlines

Disclaimer

This calculator provides estimates for informational purposes only. Tax laws are complex and change frequently. For accurate tax advice tailored to your specific situation, please consult a qualified tax professional or CPA. This calculator does not account for state taxes, Alternative Minimum Tax (AMT), or all possible credits and deductions.